JPH02113483U - - Google Patents
Info
- Publication number
- JPH02113483U JPH02113483U JP2275089U JP2275089U JPH02113483U JP H02113483 U JPH02113483 U JP H02113483U JP 2275089 U JP2275089 U JP 2275089U JP 2275089 U JP2275089 U JP 2275089U JP H02113483 U JPH02113483 U JP H02113483U
- Authority
- JP
- Japan
- Prior art keywords
- surface acoustic
- acoustic wave
- wave filter
- supplied
- output signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010897 surface acoustic wave method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案の映像中間周波回路の一実施例
を示す回路図、第２図は本考案を説明するための
図、第３図は周波数帯域通過特性を示すグラフ、
第４図は従来例を示す回路図である。
１……入力端子、２，７，１０……コンデンサ
、３，４，８，９，１０……抵抗、５……ＮＰＮ
トランジスタ、６，１３……インダクタンス、１
１……弾性表面波フイルタ（ＳＡＷＦ）、１２，
２１……可変抵抗、１４……ＩＣ、１５……出力
端子、１６……電源供給端子、２２……可変コン
デンサ、３０……逆相成分生成回路、３１……レ
ベル調整器。
FIG. 1 is a circuit diagram showing an embodiment of the video intermediate frequency circuit of the present invention, FIG. 2 is a diagram for explaining the present invention, and FIG. 3 is a graph showing frequency band pass characteristics.
FIG. 4 is a circuit diagram showing a conventional example. 1...Input terminal, 2,7,10...Capacitor, 3,4,8,9,10...Resistor, 5...NPN
Transistor, 6, 13...Inductance, 1
1...Surface acoustic wave filter (SAWF), 12,
21... Variable resistor, 14... IC, 15... Output terminal, 16... Power supply terminal, 22... Variable capacitor, 30... Negative phase component generation circuit, 31... Level adjuster.
Claims (1)
路と、 この前置増幅回路の出力信号が供給される弾性
表面波フイルタと、 前記弾性表面波フイルタの出力が供給されるレ
ベル調整器と、 前記弾性表面波フイルタの入力側と前記レベル
調整器の摺動子との間に接続され、前記弾性表面
波フイルタの入力側から出力側への直達波成分を
相殺する位相成分を発生する逆位相成分発生回路
とを備えたことを特徴とする映像中間周波回路。[Claims for Utility Model Registration] A preamplifier circuit that amplifies a supplied intermediate frequency signal; a surface acoustic wave filter to which the output signal of the preamplifier circuit is supplied; and an output signal of the surface acoustic wave filter to which the output signal is supplied. a level adjuster connected between the input side of the surface acoustic wave filter and the slider of the level adjuster, and canceling a direct wave component from the input side to the output side of the surface acoustic wave filter. A video intermediate frequency circuit comprising: an antiphase component generation circuit that generates a phase component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2275089U JPH02113483U (en) | 1989-02-28 | 1989-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2275089U JPH02113483U (en) | 1989-02-28 | 1989-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02113483U true JPH02113483U (en) | 1990-09-11 |
Family
ID=31241142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2275089U Pending JPH02113483U (en) | 1989-02-28 | 1989-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02113483U (en) |
-
1989
- 1989-02-28 JP JP2275089U patent/JPH02113483U/ja active Pending
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